WALKER, THOMAS. A Treatise upon the Art of Flying, by Mechanical Means, with a full Explanation of the Natural Principles by which Birds are enabled to Fly; likewise Instructions and Plans for Making a flying Car with Wings, in which a Man may sit, and, by working a small Lever, cause himself to ascend and soar through the Air with the facility of a Bird. Hull, 1810. Engraved folding plate. Lacking a2 (cancel?), some staining to plate and repairs along folds. FIRST EDITION. One of the rarest English books on Aviation. (Maggs catalogue # 685, Aerostation, 1940, item 104) -- A Treatise upon Aerostation; or, the Art of Travelling through the Air... Second Edition. Bristol, 1831. Engraved frontispiece -- another copy. Hull, n.d. Colored engraved folding plate. Lacking a2 (cancel?), tiny holes to plate affecting small portion of the image. Together 3 editions in one volume, various 8vo sizes, quarter morocco gilt. Sold not subject to return.